# About Us — BMI Calculator

> Learn about bmicalculatorsystem.com — a free BMI calculator built on WHO and CDC
> standards. Our mission, our methodology, and why your calculations never leave your
> browser.

Canonical page: https://bmicalculatorsystem.com/about

## A health tool that respects you

bmicalculatorsystem.com exists for one reason: to give everyone a fast, honest,
evidence-based BMI check — no sign-up required, and your calculations never leave your
browser.

## Our mission — health information without the noise

Most online health calculators bury a one-line answer under email-capture pop-ups and
endless clutter. We built this site to be the opposite: a single, fast page that
answers your question in seconds and gives you honest context around the number —
including where BMI falls short.

Every calculation on this site runs locally in your browser. Your height, weight, and
age are never uploaded, logged, or stored anywhere.

## Methodology — built on recognised standards

1. **WHO classifications.** Adult BMI categories follow the World Health
   Organization's standard cut-offs, including the full obesity sub-classes and
   thinness grades.
2. **CDC percentiles.** Results for children and teens (ages 2–19) are interpreted
   with age- and sex-specific percentiles from CDC growth charts, not adult cut-offs.
3. **Transparent math.** Every formula we use — BMI, BMI Prime, the Ponderal Index,
   and your healthy weight range — is published openly on the homepage.

## Information, not medical advice

Everything on this website is general health information intended for educational
purposes. It is not medical advice, and it is not a substitute for consultation with
a qualified healthcare professional. BMI is a screening tool — not a diagnosis. If
your result falls below 18.5 or above 30, or you have any concerns about your weight
or health, please speak with a doctor or registered dietitian.

Contact us: https://bmicalculatorsystem.com/contact